Signed by President Barack Obama and former Russian President Dmitri Medvedev in 2010, the New START Treaty caps the number of strategic missiles and heavy bombers that the U.S. and Russia can possess. The nuclear arms control treaty is set to expire in February 2021 unless an agreement is signed in the coming months. Rose Gottemoeller, the chief negotiator of New START, joins World Class to discuss what it’s like to negotiate with the Russians and the path ahead for extending the New START Treaty.